ГОСУДАРСТВЕННЫЙ СТАНДАРТ РЕСПУБЛИКИ БЕЛАРУСЬ

СОСУДЫ, РАБОТАЮЩИЕ ПОД ДАВЛЕНИЕМ

Часть 8

Дополнительные требования к сосудам, работающим под давлением, из алюминия и алюминиевых сплавов

ПАСУД31НЫ, ПРАЦУЮЧЫЯ ПАД Ц1СКАМ

Частка 8

Дадатковыя патрабаванш да пасудзш, працуючых пад щекам, з алюм1шю i алюм1шевых сплавау

(EN 13445-8:2009, ЮТ)

Издание официальное

(SB

УДК 621.642-98(083.74)(476)    МКС 23.020.30    КП 03    ЮТ

Ключевые слова: сосуды, работающие под давлением, из алюминия, требования

Предисловие

Цели, основные принципы, положения по государственному регулированию и управлению в области технического нормирования и стандартизации установлены Законом Республики Беларусь «О техническом нормировании и стандартизации».

1    ПОДГОТОВЛЕН ПО УСКОРЕННОЙ ПРОЦЕДУРЕ научно-производственным республиканским унитарным предприятием «Белорусский государственный институт стандартизации и сертификации» (БелГИСС)

ВНЕСЕН Госстандартом Республики Беларусь

2    УТВЕРЖДЕН И ВВЕДЕН В ДЕЙСТВИЕ постановлением Госстандарта Республики Беларусь от 27 ноября 2009 г. № 61

3    Настоящий стандарт идентичен европейскому стандарту EN 13445-8:2009 Unfired pressure vessels - Part 8: Additional requirements for pressure vessels of aluminium and aluminium alloys (Сосуды, работающие под давлением. Часть 8. Дополнительные требования к сосудам, работающим под давлением, из алюминия и алюминиевых сплавов).

Европейский стандарт разработан техническим комитетом по стандартизации CEN/TC 54 «Сосуды, работающие под давлением» Европейского комитета по стандартизации (CEN).

Перевод с английского языка (еп).

Официальные экземпляры европейского стандарта, на основе которого подготовлен настоящий государственный стандарт, и европейских стандартов, на которые даны ссылки, имеются в Национальном фонде ТИПА.

Степень соответствия - идентичная (ЮТ)

4    ВВЕДЕН ВПЕРВЫЕ

© Госстандарт, 2010

Настоящий стандарт не может быть воспроизведен, тиражирован и распространен в качестве официального издания без разрешения Госстандарта Республики Беларусь

Издан на русском языке

СТБ EN 13445-8-2009

Material group Nominal thickness e„a (mm) Test specimens b 21,22.1,22.2, 22.3, 22.4, 23.1 <35 1 FB, 1 RB (or2 SB fore > 12 mm), 1 TT, 1 Ma > 35 2 SB, 1 TT, 1 Ma, 1 LTC

a Thinner plate thickness. b For symbols see Table 8.3-2 of EN 13445-4:2009. c For information for LT see 8.4.3 of EN 13445-4:2009.

7.10    Performance of test and acceptance criteria

The requirements in 8.4.2, 8.4.3, 8.4.5 and 8.4.6 of EN 13445-4:2009 shall apply subject to the replacement of reference to EN ISO 15614-1 with EN ISO 15614-2:2005. The requirements in 8.4.1, 8.4.9 and 8.4.10 of EN 13445-4:2009 shall apply, the requirements in 8.4.7 and 8.4.8 of EN 13445-4:2009 shall not apply.

7.11    Forming procedures

7.11.1    As to cold forming the requirements in 9.3.1 of EN 13445-4:2009 shall apply with the following modification:

a)    cold forming of material groups 21 and 22.1 to 22.4 shall be carried out at temperatures below 200 °C;

b)    cold forming of material 23.1 is not allowed (T4 and T6).

7.11.2    As to hot forming the requirements in 9.3.2 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys.

Hot forming of aluminium and its alloys shall be carried out in a temperature range of 320 °C to 420 °C. The last stage of the hot forming process shall be completed above 300 °C, otherwise a subsequent heat treatment to achieve the О Temper is required.

7.12    Heat treatment after forming

7.12.1 For heat treatment of flat products after cold forming the requirements in 9.4.2 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys. For aluminium and its alloys the heat treatment shall be carried out in accordance with Table 7.12-1.

8

Material group	Ratio of deformation	Heat treatment
21	< 15 %	no
21	> 15 %	yes a, annealing
22.1 b, 22.2 b, 22.3 b, 22.4 b	< 5 %	no
22.1 b, 22.2 b, 22.3 b, 22.4 b	> 5 %	yes c, annealing
a With levels of cold forming and a ratio of deformation above 15 % for materials of group 21 or above, if proof can be furnished in specific cases that the residual elongation after fracture after cold forming remains at least 10 %, then in these cases annealing is not required.
b Elongation prior to forming > 14 %.
c With levels of cold forming and a ratio of deformation above 5 % for materials of group 22 or above, if proof can be furnished in specific cases that the residual elongation after fracture after cold forming remains at least 10 %, then in these cases annealing is not required.

The heat treatment parameters shall be in accordance with the material specification of the material manufacturer. The general heat treatment parameters shall be:

a)    the heating rate shall be as rapid as possible;

b)    the holding temperature shall be in the range between 320 °C and 380 °C depending on the alloy type;

c)    the holding time at the holding temperature shall be between 10 min and 60 min depending on the ratio of cold forming and the thickness of the material;

d)    the cooling shall be performed in still air, the cooling rate needs not to be controlled.

7.12.2 For heat treatment of tubular products after cold forming the requirements in 9.4.3 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloy. For aluminium and its alloys heat treatment shall be carried out in accordance with Table 7.12-2.

Table 7.12-2 — Heat treatment of tubular products after cold forming

Material group Bending radius for the tube External diameter of the tube Heat treatment R De 21 >1,3 De all diameters no 21 < 1 ,3 De all diameters yes, annealing 22.1 a, 22.2 a, 22.3 a, 22.4 a >2.5 De all diameters no 22.1 a, 22.2 a, 22.3 a, 22.4 a < 2.5 De all diameters yes, annealing a Elongation prior to forming > 14 %.

9

СТБ EN 13445-8-2009

The heat treatment parameters (annealing) shall be in accordance with the material specification of the material manufacturer. The general heat treatment parameters shall be:

a)    the heating rate shall be as rapid as possible;

b)    the holding temperature shall be in the range between 320 °C and 380 °C depending on the alloy type;

c)    the holding time at the holding temperature shall be between 5 min and 60 min depending on the ratio of cold forming and the thickness of the material;

d)    the cooling shall be performed in still air, the cooling rate needs not to be controlled.

7.12.3 For the heat treatment after hot forming the requirements in 9.4.5 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys. For aluminium and its alloys heat treatments shall be carried out in accordance with Table 7.12-3.

Table 7.12-3 — Heat treatment after hot forming

Material group Hot forming conditions Heat treatment 21,22.1,22.2, 22.3, 22.4 No subsequent heat treatment should be applied if the forming process of the last forming stage is completed above 300 °C. no

7.12.4 The requirements in 9.4.4 and 9.4.6 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys.

7.13    Sampling of formed products

7.13.1    The requirements in 9.5.1 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys.

If heat treatment is not required by Table 7.12-1 and 7.12-2 after cold forming of plates or tubes, then no mechanical tests are required in respect of forming.

7.13.2    The requirements in 9.5.2 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys.

For all material groups allowed by Clause 5 a test plate shall be subjected to heat treatment together with the formed products or be subjected to a similar heat treatment separately. The following number of test coupons shall be taken:

a)    one test coupon from a batch of up to 10 parts;

b)    two test coupons from a batch of up to 25 parts;

c)    three test coupon from a batch of up to 100 parts;

d)    one test coupon for every further 100 parts.

7.14    Tests

7.14.1 Base material

The requirements in 9.6.1 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys.

10

СТБ EN 13445-8-2009

For pressure vessels of aluminium and its alloys one tensile test shall be taken from each test coupon required in 7.13.2. The test specimens shall be taken transverse to the rolling direction with a deviation not greater than 20°.

7.14.2 Buttwelds

The requirements in 9.6.2 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys. NOTE This does not decrease the need to have a PQR test in the heat treated condition as required by 7.3.

7.15 Post weld heat treatment (PWHT)

The requirements in Clause 10 of EN 13445-4:2009 are not applicable for pressure vessels of aluminium and its alloys. However, the following shall apply for pressure vessels of aluminium and its alloys:

a)    stress relieving heat treatment is normally not necessary or desirable for welded aluminium vessels except if there is a risk of stress corrosion due to the service media. Annealing heat treatment carried out for obtaining the delivery state О is the only usable heat treatment;

b)    for material group 23.1 PWHT is not permitted;

c)    the heat treatment parameters (annealing) shall be in accordance with the material specification of the material manufacturer or those as stated in Table 7.12-3.

8 Inspection and testing

8.1    General

The requirements in EN 13445-5:2009 shall apply with the following additions/exclusions.

8.2    Non-destructive testing of welded joints

8.2.1 General

The testing of vessels of aluminium and aluminium alloys shall be according the testing groups according to Table 8.2-1.

All testing groups shall require 100 % visual inspection to the maximum extent possible.

Testing group 4 shall be applicable only for:

—    PS < 20 bar; and

—    maximum number of full pressure cycles < 500; and

lower level of nominal design stress (according to EN 13445-3:2009).

11

СТБ EN 13445-8-2009

Testing group 1 2 a 3 4 Permitted materials e 21,22.1 to 22.4 21,22.1 to 22.4, 23.1 9 21,22.1 to 22.4, 23.1 9 21,22.1 to 22.4 (except EN AW 5454) Extent of NDT of governing welded joints cf 100 % 100%-10%b 10 % 0% NDT of other welds Defined for each type of weld in Table 6.6.2-1 of EN 13445-5:2009. Joint coefficient 1 1 0,85 0,7 Maximum thickness for which specific materials are permitted Unlimited d 40 mm 40 mm 20 mm Welding process Unlimited d Fully mechanical welding onlya Unlimited d Unlimited d Service temperature range Unlimited d Unlimited d Unlimited d Unlimited d

A Fully mechanised and/or automatic welding process (see EN 1418) b First figure: initially; second figure: after satisfactory experience. For definition of "satisfactory experience", see 8.2.2. c See testing details in Table 8.3-1 of this Part 8. d "Unlimited" means no additional restriction due to testing. The limitations mentioned in this table are limitations imposed bytesting. Other limitations given in the various clauses of this European Standard (such as design, or material limitations etc.) shall also be taken into account.

8.2.2 Demonstration of satisfactory experience for testing group 2

The requirements in 6.6.1.1.4 of EN 13445-5:2009 shall apply with the following modifications:

—    in case of groups 21,22.1 to 22.4, except EN AW 5454, the successful production is 25 consecutive pressure vessels or 50 consecutive metres of governing welded joints;

—    in case of materials of group 23.1 and EN AW 5454, it is 50 consecutive pressure vessels or consecutive 100 m of governing welded joints;

—    experience in material group 22.4 covers experience in material groups 21,22.1,22.2 and 22.3;

—    experience is accepted as long as there is a valid welding procedure approval test for a more critical or at least a comparable material.

12

СТБ EN 13445-8-2009

8.2.3    Symbols

The following symbols are used in the tables of Clause 8:

A area surrounding the gas pores

a nominal throat thickness of the fillet weld (see also ISO 2553:1992)

b width of weld reinforcement

d diameter of gas pore

d_A diameter of area surrounding the gas pores

d;    inner diameter

d_n nominal diameter

e, t wall or plate thickness (nominal size)

h height or width of imperfection

L length of projected or cross section area

/ length of imperfection in longitudinal direction of the weld

s nominal butt weld thickness (see also ISO 2553:1992)

w width of the weld or width or height of the cross section area

8.3    Determination of extent of non destructive testing

The requirements in 6.6.2 of EN 13445-5:2009 shall apply with the following modification:

Table 6.6.2-1 of EN 13445-5:2009 shall be replaced by Table 8.3-1, and NOTE 2 shall be replaced by:

a)    multilayer welds;

b)    performed by Metal Inert Gas (MIG 131) or Tungsten Inert Gas (TIG 141).

Special problems arising from elements such as those described below shall be considered especially for longitudinal joints:

c)    other process, e.g. plasma 15, electron beam (EB) 76, friction welding 42;

d)    single run weld, single run from one side or both sides;

e)    automatic welding processes.

13

СТБ EN 13445-8-2009

Table 8.3-1 — Extent of non destructive testing

Testing group 1 2 3 4 Parent materials 1 m n 21,22.1 to 22.4 21,22.1 to 22.4 except 23.1 21,22.1 to 22.4, and 23.1° 21,22.1 to 22.4 (except EN AW 5454) Type of weld э Testing b Extent Extent Extent Extent Full 1 Longitudinal joint RT or UT 100 % (100-10) % p 10 % p 0P pci icuauui i butt weld FT 0 0 0 0 2a Circumferential joint on a shell RT or UT 25 % (25-10) % 10%c 0 PT 0 0 0 0 2b Circumferential joint on a shell RT or UT 25 % (25-10) % 10% 0 with backing strip k PT 0 0 0 0 2c Circumferential joggle jointk RT or UT 25 % (25-10) % 10% 0 PT 0 0 0 0 3a Circumferential joint on a nozzle RT or UT 25% (25-10)% 10% c 0 with d\ > 150 mm or e > 16 mm PT 0 0 0 0 3b Circumferential joint on a nozzle RT or UT 25 % (25-10) % 10% 0 with d\ > 150 mm or e > 16 mm with backing strip k PT 0 0 0 0 4 Circumferential joint on a nozzle RT or UT 0 0 0 0 with d\ < 150 mm and e < 16 mm PT 50 % (50-10) % 10 % d 0 5 All welds in shells, heads and in RT or UT 100 % 100% 10 % p op hemispherical heads to shells PT 0 0 0 0 6 Assembly of a conical shell with RT or UT 25 % (25-10) % 10% op a cylindrical shell angle < 30° PT 0 0 0 0 7 Assembly of a conical shell with RT or UT 100 % (100-25) % 10% 10% a cylindrical shell angle > 30° PT 0 0 10% d 0 Fillet weld, 8 Circumferential lapped joint RT or UT NA NA NA op lapped joints k head to shell PT NA NA NA 0 Assembly of 9 With full penetration RT or UT 25 % (25-10) % 10% op a flat head or PT 0 0 0P op tubesheet, with a cylindrical shell; assembly of a flange or a 10 With partial penetration, if a > 16 mm (as defined in Figure 6.6.2-1 of EN 13445-5:2009)' RT or UT PT NA NA NA NA 10% 0 0 0 11 With partial penetration, if a RT or UT NA NA 0 0 collar with a shell < 16 mm (as defined in Figure 6.6.2-2 of EN 13445-5:2009)' PT NA NA 10% 0 Assembly of 12 With full penetration RT or UT NA NA NA 0 a flange or a collar with a ПП77|р with PT 25 % 9 (25-10) % 10% 0 13, 14 With partial penetration' RT or UT NA NA 0 0 dn > 200 mm and >25 a PT NA NA 10 % d P op

14

СТБ EN 13445-8-2009

8.4 Applicable non destructive testing techniques

8.4.1 NDT methods

The requirements in Table 6.6.3-1 of EN 13445-5:2009 shall be replaced by Table 8.4-1.

Table 8.4-1 shows the method characterisation and acceptance criteria to be applied to aluminium weldments. Th< table is based on EN 12062:1997and EN ISO 10042:2005. Tahtla Й Л.Л

NDT Methods (abbreviations) Techniques Characterisation Acceptance criteria Visual inspection (VT) EN 970:1997 EN ISO 10042:2005 (surface imperfections) EN ISO 10042:2005; for acceptance level and -criteria see Table 8.4.3-1 C Radiography (RT) EN 1435:1997, class В a EN ISO 10042:2005 (internal imperfections) EN ISO 10042:2005; for acceptance level and -criteria see Table 8.4.2-1 Ultrasonic Testing (UT) EN 1714:1997 for thickness t (mm): t < 40: class A 40 < t < 100: class В t > 100: class C EN 1713:1998 b EN 1712:1997; for acceptance level 2 and no planar imperfections accepted Penetrant Testing (PT) EN 571-1:1997 and testing parameters of EN 1289:1998, Table A.1 EN 1289:1998 EN 1289:1998 For acceptance level and -criteria see Table 8.4.4-1 a However, the maximum area for single exposure shall correspond to the requirements of Class A of EN 1435:1997. b EN 1713 is a recommendation only. c Additional requirements for the following imperfections: —    stray arc (601) — removal plus 100 % PT to ensure no imperfection; —    spatter (602) — weld spatter shall be removed from all pressure parts and load carrying attachment welds; —    isolated non systematic spatter is permitted; —    torn surface (603), grinding mark (603), chipping mark (605) shall be ground to provide a smooth transition; —    underflushing (606) shall not be permitted. Any local underflushing shall be related to design characteristics.

16

СТБ EN 13445-8-2009

8.4.2 Acceptance criteria for radiographic testing (RT)

The acceptance criteria for radiographic testing shall be in accordance with Table 8.4.2-1, and not Table 6.6.4-1 in EN 13445-5:2009.

Where Table 8.4.2-1 does not give acceptance criteria then the criteria according to EN ISO 10042:2005 Level В shall be used.

Table 8.4.2-1 —Acceptance criteria for radiographic testing (RT)

EN ISO 6520-1:2007 imperfection reference n° Type of imperfection Designation Maximum permitted 2016 Worm-hole isolated EN ISO 10042:2005, level C Worm-hole aligned Not permitted 303 Oxide inclusion EN ISO 10042:2005, level C 3041 Tungsten inclusion EN ISO 10042:2005, level C 2011 Gas pore EN ISO 10042:2005, level C 2013 Clustered (localised) porosity EN ISO 10042:2005, level C

8.4.3 Acceptance criteria for visual and surface penetrant testing

The acceptance criteria for visual and surface penetrant testing shall be in accordance with Table 8.4.3-1 and 8.4.4-1.

Where Table 8.4.3-1 does not give acceptance criteria then the criteria according to EN ISO 10042:2005, level В shall be used.

Table 8.4.3-1 — Acceptance criteria for visual testing (VT)

EN ISO 6520-1:2007 imperfection reference n° Type of Imperfection Designation Maximum permitted 502 Excess weld metal (butt weld) EN ISO 10042:2005, level C 503 Excessive convexity (fillet weld) EN ISO 10042:2005, level C 504 Excessive penetration EN ISO 10042:2005, level C 507 Linear misalignment See requirements of 5.2 and 5.3 of EN 13445-4:2009; “middle line - and surface alignment”

17

СТБ EN 13445-8-2009

Введение

Настоящий стандарт содержит текст европейского стандарта EN 13445-8:2009 на языке оригинала и его перевод на русский язык (справочное приложение Д.А).

Введен в действие как стандарт, на который есть ссылка в Еврокоде EN 1993-1-8:2005.

ГОСУДАРСТВЕННЫЙ СТАНДАРТ РЕСПУБЛИКИ БЕЛАРУСЬ

СОСУДЫ, РАБОТАЮЩИЕ ПОД ДАВЛЕНИЕМ Часть 8

Дополнительные требования к сосудам, работающим под давлением, из алюминия и алюминиевых сплавов

ПАСУД31НЫ, ПРАЦУЮЧЫЯ ПАД Ц1СКАМ Частка 8

Дадатковыя патрабаванш да пасудзш, працуючых пад ц1скам, з алюмш1ю i алюм1шевых сплавау

Unfired pressure vessels Part 8

Additional requirements for pressure vessels of aluminium and aluminium alloys

Дата введения 2010-01-01

СТБ EN 13445-8-2009

8.4.4 Acceptance criteria for penetrant testing (PT)

Table 8.4.4-1 includes acceptance criteria according to EN 1289:1998 and additional requirements.

Table 8.4.4-1 Acceptance criteria for penetrant testing (PT)

Type of Imperfection Designation Definition of ma> / = <10 mm rimum permitted />10 mm Linear indication EN 1289:1998, level 1 EN 1289:1998, level 1 Rounded indication EN 1289:1998, level 1 EN 1289:1998, level 2 Summation of inear- and rounde< 1 j indie :ations Permitted if the summation of the indication area is <0,5 % of the considered area of weld (L x »v). Clustered indications are not permitted. mm ■ ( 4 —► d -

8.5 Selection of non-destructive testing methods for internal imperfections

The requirements in 6.6.3.3 of EN 13445-5:2009 shall apply with the following modification: Table 6.6.3-2 in EN 13445-5:2009 shall be replaced by Table 8.5-1.

Table 8.5-1 — Selection of non destructive testing method3 for determining internal imperfections, in accordance with EN 12062:1997, Table 3

Material: Aluminium and its alloys Parent material nominal thickness (e in millimetres) type of joint e < 8 8 < e < 40 40 < e < 100 <?> 100 Butt joints, full penetration RT class В or (UT class A) RT class В or UT class A RT class В or UTb class В UTb class C T-joints, full penetration RT class В or UT class A UT class A or (RT class B) UT class В or (RT class B) UT class C Butt joints or T-joints, partial penetration Throat thickness of weld (a in millimetres) a > 16 mm RT class В or UT class A 3 - RT and UT mean radiographic and ultrasonic testing in accordance with the standards mentioned in Table 8.3-1. b For e 2 60 mm UT shall include examination for imperfections perpendicular to the surface in accordance with EN 583-4:2002.

For surface condition and preparation for non destructive testing the requirements in 6.6.3.5 of EN 13445-5:2009 shall apply with the following modification:

The last sentence in EN 13445-5:2009, 6.6.3.5, about cyclic loading is not applicable to aluminium pressure vessels.

18

СТБ EN 13445-8-2009

1 Scope

This Part 8 of this European Standard specifies requirements for unfired pressure vessels and their parts made of aluminium and aluminium alloys in addition to the general requirements for unfired pressure vessels under EN 13445:2009 Parts 1 to 5. This European Standard specifies unfired pressure vessels for loads up to 500 full cycles.

NOTE Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this European Standard.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

EN 571-1:1997, Non-destructive testing — Penetrant testing — Part 1: General principles

EN 573-3:2007, Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3: Chemical composition

EN 583-4:2002, Non-destructive testing — Ultrasonic examination — Part 4: Examination for discontinuities perpendicular to the surface

EN 970:1997, Non-destructive examination of fusion welds— Visual examination

EN 1289:1998, EN 1289:1998/A1:2002, EN 1289:1998/A2:2003, Non-destructive examination of welds — Penetrant testing of welds — Acceptance levels

EN 1435:1997, EN 1435:1997/A1:2002, EN 1435:1997/A2:2003, Non-destructive examination of welds — Radiographic examination of welded joints

EN 1712:1997,    EN 1712:1997/A1:2002,    EN 1712:1997/A2:2003,    Non-destructive    examination    of    welds    —

Ultrasonic examination of welded joints — Acceptance levels

EN 1714:1997,    EN 1714:1997/A1:2002,    EN 1714:1997/A2:2003,    Non-destructive    examination    of    welds    —

Ultrasonic examination of welded joints

EN 12062:1997, EN 12062:1997/A1:2002, EN 12062:1997/A2:2003, Non-destructive examination of welds — General rules for metallic materials

EN 12392:2000, Aluminium and aluminium alloys — Wrought products — Special requirements for products intended for the production of pressure equipment

EN 13445-1:2009, Unfired pressure vessels — Part 1: General

EN 13445-2:2009, Unfired pressure vessels — Part 2: Materials

EN 13445-3:2009, Unfired pressure vessels— Part 3: Design

fm 13445-4:2009, Unfired pressure vessels — Pert 4/ Fsbricetion

EN 13445-5:2009, Unfired pressure vessels — Part 5: Inspection and testing

EN ISO 6520-1:2007, Welding and allied processes — Classification of geometric imperfections in metallic materials — Part 1: Fusion welding (ISO 6520-1:2007)

EN ISO 9606-2:2004, Qualification test of welders — Fusion welding — Part 2: Aluminium and aluminium alloys (ISO 9606-2:2004)

1

СТБ EN 13445-8-2009

EN ISO 10042:2005, Welding — Arc-welded joints in aluminium and its alloys — Quality levels for imperfections (ISO 10042:2005)

EN ISO 15614-2:2005, Specification and qualification of welding procedures for metallic materials — Welding procedure test— Part 2: Arc welding of aluminium and its alloys (ISO 15614-2:2005)

CR ISO/TR 15608:2000, Welding — Guidelines for a metallic materials grouping system (ISO/TR 15608:2000)

3    Terms, definitions, symbols and units

For the purposes of this document, the terms, definitions, symbols and units given in EN 13445:2009 Parts 1 to 5 apply.

NOTE Further symbols are listed in 8.2.3.

4    General requirements

The general requirements of EN 13445-1:2009 shall apply.

5    Materials

5.1    General

The requirements of EN 13445-2:2009 shall apply with the following additions/exclusions.

5.2    Elongation after fracture

NOTE Also see 4.1.4 of EN 13445-2:2009.

Aluminium and aluminium alloys used for welded parts of pressure vessels that are subjected to cold forming (e.g. rolled shells and heads) shall have a specified minimum elongation after fracture measured on a gauge length

L₀ = 5,65^7    (5-2-1)

that is > 14 % in the longitudinal or transverse direction as defined by the material specification.

Aluminium and aluminium alloys used for parts of pressure vessels that are not subjected to cold forming (e.g. straight flanges and nozzles) shall have a specified minimum elongation after fracture measured on a gauge length

L₀ = 5,65^    (5.2-2)

that is > 10 % in the longitudinal or transverse direction as defined by the material specification.

5.3    Prevention of brittle fracture

NOTE 1 Also see 4.1.6 of EN 13445-2:2009.

Annex В of EN 13445-2:2009 is not applicable.

NOTE 2 The requirements of 4.3 of EN 1252-1:1998 should be used for determining the minimum design and temperature and the requirements to prevent brittle fracture.

2

СТБ EN 13445-8-2009

5.4    Lamellar tearing

NOTE Also see 4.2.1.2 of EN 13445-2:2009.

Specific requirements of lamellar tearing for pressure vessels of aluminium and its alloys are not applicable.

5.5    Chemical composition

The chemical composition shall be in accordance with their material specification, except that all materials sha have a maximum lead content of 150 pig/g.

It is recommended that the material to be used for welded components be produced from rolling or extrusion ingot: with hydrogen level no greater than 0,2 ml per 100 g aluminium, measured on liquid metal during casting.

5.6    Material grouping system

Annex A of EN 13445-2:2009 is not applicable for pressure vessels of aluminium and its alloys.

The allowable materials for the construction of aluminium alloy pressure vessels shall be according to Table 5.6-below.

Table 5.6-1 — Grouping system based on CR ISO/TR 15608:2000 and allowable materials of construction based on EN 12392:2000 using the EN AW numbers according to EN 573-3:2007

NOTE Any product form available in EN 12392:2000 for a material in this table at an indicated temper is acceptable fo construction to this European Standard, as long as the requirements of 5.2 and 5.5 are fulfilled. Other materials not defined hen may be used by agreement by the parties concerned (see 4.1.4 of EN 13445-2:2009) if they meet the requirements of 5.2 an< 5.5 and a particular material appraisal is produced (see EN 764-4:2002).

Group Sub group Type of aluminium and aluminium alloys Designation EN AW number Chemical symbol Temper 21 Pure aluminium with < 1 % impurities or alloy content ENAW— 1050A ENAW— 1070A ENAW— 1080A ENAW-AI 99,5 EN AW-AI 99,7 EN AW-AI 99.8(A) О, Hill, H112 О, Hill, H112 О, Hill, H112 22 Non heat treatable alloys 22.1 Aluminium-manganese alloys ENAW —3003 CM A\M 04 no l_l N /-\V V - J 1 UtJ ENAW —3105 EN AW-AI MnICu CM Л\Л/ Л1 ЛЛ«4 l_l Ч ГЛМ V-/-\l IVI1 1 1 EN AW-AI MnO,5MqO,5 О, Hill, H112 ГЛ U1-H U-MO 42, 11111,1111^. O, Hill 22.2 Aluminium-magnesium alloys with Mg < 1,5 % ENAW —5005 EN AW —5005A ENAW —5050 EN AW-AI Mgl(B) EN AW-AI Mgl(C) EN AW-AI Mg 1,5(C) О, Hill, H112 О, Hill, H112 O, Hill 22.3 Aluminium-magnesium alloys with 1,5 %< Mg < 3,5 % ENAW —5049 ENAW —5052 EN AW —5154A ENAW —5251 ENAW —5454 ENAW —5754 EN AW-AI Mg2MnO,8 EN AW-AI Mg2,5 EN AW-AI Mg3,5(A) EN AW-AI Mg2 EN AW-AI Mg3Mn(A) EN AW-AI Mg3 О, Hill, H112 О, Hill, H112 О, Hill, H112 О, Hill, H112 О, Hill, H112 О, Hill, H112 22.4 Aluminium-magnesium alloys with Mg > 3,5 % ENAW —5083 ENAW —5086 EN AW-AI Mg4,5MnO,7 EN AW-AI Mg4 О, Hill, H112 O, Hill 23 Heat treatable alloys 23.1 Aluminium-magnesium-silicon alloys ENAW —6060 ENAW —6061 EN AW-AI MgSi EN AW-AI MgISiCu T4a T4 ь, T6 c

a for profiles only b for seamless pipes and flanges only 0 for flanges only

3

СТБ EN 13445-8-2009

6 Design

6.1    General

The requirements of EN 13445-3:2009 shall apply with the following additions/exclusions.

6.2    Design temperature and properties

NOTE Also see 4.2.2 of EN 13445-2:2009.

The 2^nd paragraph of 4.2.2.1 of EN 13445-2:2009 is not applicable for aluminium and its alloys.

The maximum design temperature shall not exceed that defined in Table 1 of EN 12392:2000 as the maximum working temperature.

The mechanical properties used for design shall be taken from the tabulated values in EN 12392:2000 at room temperature forR^o and at the highest design temperature former.

For welded parts and heat treated parts after forming only the values equivalent to the О temper shall be used for design when 6000 series flanges etc. are welded. These values are not quoted in EN 12392:2000 and so the tabulated values for/shown in Table 6.3-2 shall be used for design. The weld area shall be based on the О temper but the flange strength away from the weld (21) may be based on the actual temper (T4 or T6).

For aluminium and aluminium alloys values of 0,2 % proof strength (or 1 % proof strength for material group 21-1000 series aluminium) for temperatures above 20 °C shall be established by linear interpolation between two adjacent values in EN 12392:2000 except that for alloys 5083 and 5086 the respective value at 50 °C may be used for 65 °C.

6.3    Time-independent nominal design stress

The design stress for aluminium and aluminium alloy materials shall be in accordance with the Table 6.3-1.

Table 8.3-1 — Desiyn Stresses for aluminium and aiuminiuiii alloy material

Group according to Table 5.6-1 Design stresses at design condition Design stresses at test condition 21 f~ [^pl.O.r / 1 ,5] ./test “ [^pl.0,20 / 1 ,05] 22 /= min ([Дродг /1,5]; [Дт,20 / 2,4]) /test = [^p0,2. 20 / 1 ,05] 23 /= min ([A!po,2,r! 115]; [Am 2o / 3] ./test = [tfp0,2, 20 / 1 ,05]

Table 6.3-2 — Allowable Design Stress values for 6000 series Aluminium alloys in the welded condition (see 6.2)

Material designation to EN 12392:2000 Value of/for design temperature (°C) not exceeding 50 75 100 125 150 175 200 EN AW 6060 40 40 40 38 36 22 14 EN AW 6061 55 55 55 54 51 43 32

6.4 Thick walled, small bore piping for shells

Equation 6.4-1 and 6.4-2 may be used as an alternative to Annex В and C in EN 13445-3:2009 for thick-walled piping of aluminium and aluminium alloy materials, i.e. for piping with е/Д,>0,16 and DN < 50. The maximum allowable pressure shall be used for design.

4

СТБ EN 13445-8-2009

c)    the nominal wall thickness of the thickest pressure part does not exceed 12 mm;

d)    the inside of the vessel is not subject to corrosion;

e)    the intersections between longitudinal and circumferential joints shall be radiographed and found to be free of unacceptable imperfections;

f)    the maximum vessel diameter does not exceed 1 600 mm.

6.6.4 Joints with permanent backing strips

Permanent backing strips shall not be used for longitudinal seams.

Permanent backing strips are permitted for circumferential seams and for shell or head closure plates only under the following conditions:

a)    materials are limited to material groups 21,22.1 to 22.4 and 23.1;

b)    non-destructive examination is carried out in accordance with the design/joint efficiency to the same quality and acceptance criteria as a single-sided buttweld;

c)    the inside of the vessel is not subject to corrosion;

d)    backing strip material shall be of the same aluminium sub group as the vessel unless the combination of other backing strip material has been proven by a WPQR according to EN ISO 15614-2:2005.

7 Manufacture

7.1    General

The requirements of EN 13445-4:2009 shall apply with the following additions/exclusions.

7.2    Materials

Aluminium and aluminium alloy materials and their grouping shall be in accordance with 5.6.

7.3    Welding procedure specification (WPS)

NOTE Also see 7.2 of EN 13445-4:2009.

Gas welding according to EN ISO 4063:2000 is not permitted.

7.4    Qualification of welding procedure specifications (WPQR)

The requirements in 7.3 of EN 13445-4:2009 shall apply with the following modifications:

a) replace reference to EN ISO 15614-1 with EN ISO 15614-2:2005, except for radiographic acceptance which shall be in accordance with Clause 8;

b) furthermore, impact testing is not applicable for pressure vessels of aluminium and aluminium alloys.

6

7.5 Qualification of welders and welding operators

The requirements in 7.4 of EN 13445-4:2009 shall apply with the following modification: Replace reference to EN 287-1 with EN ISO 9606-2:2004.

7.6    Joint preparation

In addition to the requirements of 7.6 in EN 13445-4:2009 the following shall apply for pressure vessels of

aluminium and its alloys:

a)    aluminium and its alloys shall be cut to size and shape preferably by machining or by thermal cutting process, e.g. plasma arc cutting, or by a combination of both. Additionally, hydro-mechanical methods of edge preparation are acceptable;

b)    for plates of < 25 mm thickness cold shearing is permissible. Edges that are cut by thermal process or by cold shearing shall be dressed back by machining unless the manufacturer can demonstrate that the material and the weldability have not been adversely affected by the cutting process;

c)    the aluminium surface to be welded shall be thoroughly cleaned of aluminium oxide traces and greases by mechanical means or by pickling. Chloride-containing detergents are prohibited (also see Clause 4 of EN 13445-4:2009).

7.7    Preheat

In addition to the requirements of 7.9 in EN 13445-4:2009 the following shall apply for pressure vessels of aluminium and its alloys:

a)    preheating of aluminium and aluminium alloys is not required for metallurgical reasons and is therefore not mandatory. Preheating may be applied by the manufacturer for practical reasons, e.g. a heating at about 50 “C may facilitate the elimination of traces of water;

b)    for aluminium alloys containing 3,0 % or more magnesium an extended preheating and interpass time at temperatures of 150 °C and above shall not be permitted as it may result in grain boundary precipitation of Al₃-Mg₂ and disintegration in weld areas.

7.8 Production test, reference criteria

The requirements in 8.2 of EN 13445-4:2009 are applicable with the following modifications:

a)    the requirements for impact testing are not relevant to aluminium materials, and so all of subsection a) in 8.2 of EN 13445-4:2009 shall be deleted;

b)    under c) in 8.2 of EN 13445-4:2009 replace reference to material group 1.1 with aluminium materials 21,22.1, 22.3 (except EN AW 5454) and 22.4;

c)    under a) in 8.2 of EN 13445-4:2009 replace reference to material groups 1 aluminium materials permitted by Clause 5 of this ;

d)    paragraph e) in 8.2 of EN 13445-4:2009 is not applicable.

7.9 Extent of testing

Table 8.3-1 of EN 13445-4:2009 is not applicable for pressure vessels of aluminium and its alloys. For aluminium materials the following Table 7.9-1 shall apply:

7